Fwd: [postmaster@vger.kernel.org: Delivery reports about your email [FAILED(1)]]

[Matti Aarnio <matti.aarnio@zmailer.org>]

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Reporting-MTA: dns; vger.kernel.org
Return-Path: <stable-commits-owner@vger.kernel.org>
Arrival-Date: Fri, 16 Nov 2007 13:09:40 -0500
Local-Spool-ID: S1751399AbXKPSJk


FAILED:
  Original Recipient:
      rfc822;jfunk@funktronics.ca
  Final Recipient:
      RFC822;jfunk@funktronics.ca
  Status:
      5.1.1 (bad destination mailbox)
  Remote MTA:
      dns; elseed.funktronics.ca (65.61.206.36|25|209.132.176.167|48741)
  Last Attempt Date:
      Fri, 16 Nov 2007 13:10:02 -0500
  X-ZTAID:
      smtp[6139]
  Diagnostic Code:
      smtp; 550 (Error: improper use of 8-bit data in message body)
  Control data:
      smtp funktronics.ca jfunk@funktronics.ca 99
  Diagnostic texts:
      <<- MAIL From:<stable-commits-owner@vger.kernel.org> BODY=8BITMIME SIZE=3712
     ->> 250 Ok
     <<- RCPT To:<jfunk@funktronics.ca>
     ->> 250 Ok
     <<- DATA
     ->> 354 End data with <CR><LF>.<CR><LF>
     <<- .
     ->> 550 Error: improper use of 8-bit data in message body

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Reporting-MTA: dns; vger.kernel.org
Arrival-Date: Fri, 16 Nov 2007 13:09:40 -0500
Local-Spool-ID: S1751399AbXKPSJk

Original-Recipient: rfc822;jfunk@funktronics.ca
Final-Recipient: RFC822;jfunk@funktronics.ca
Action: failed
Status: 5.1.1 (bad destination mailbox)
Remote-MTA: dns; elseed.funktronics.ca (65.61.206.36|25|209.132.176.167|48741)
Last-Attempt-Date: Fri, 16 Nov 2007 13:10:02 -0500
Diagnostic-Code: smtp; 550 (Error: improper use of 8-bit data in message body)


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Subject: patch tcp-make-sure-write_queue_from-does-not-begin-with-null-ptr.patch queued to -stable tree
To:	ilpo.jarvinen@helsinki.fi, davem@davemloft.net
Cc:	<stable@kernel.org>, <stable-commits@vger.kernel.org>
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From: <gregkh@suse.de>
To: ilpo.jarvinen@helsinki.fi, davem@davemloft.net
Cc: <stable@kernel.org>, <stable-commits@vger.kernel.org>
Subject: patch tcp-make-sure-write_queue_from-does-not-begin-with-null-ptr.patch queued to -stable tree
Date: Fri, 16 Nov 2007 10:08:58 -0800
Message-ID: <20071116180937.250A0144AB0C@imap.suse.de>


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From: <gregkh@suse.de>
To: ilpo.jarvinen@helsinki.fi, davem@davemloft.net
Cc: <stable@kernel.org>, <stable-commits@vger.kernel.org>
Subject: patch tcp-make-sure-write_queue_from-does-not-begin-with-null-ptr.patch queued to -stable tree
Date: Fri, 16 Nov 2007 10:08:58 -0800
Message-ID: <20071116180937.250A0144AB0C@imap.suse.de>


This is a note to let you know that we have just queued up the patch titled

     Subject: TCP: Make sure write_queue_from does not begin with NULL ptr (CVE-2007-5501)

to the 2.6.23-stable tree.  Its filename is

     tcp-make-sure-write_queue_from-does-not-begin-with-null-ptr.patch

A git repo of this tree can be found at 
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary


>From 96a2d41a3e495734b63bff4e5dd0112741b93b38 Mon Sep 17 00:00:00 2001
From: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Date: Wed, 14 Nov 2007 15:47:18 -0800
Subject: TCP: Make sure write_queue_from does not begin with NULL ptr (CVE-2007-5501)

From: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
patch 96a2d41a3e495734b63bff4e5dd0112741b93b38 in mainline.

NULL ptr can be returned from tcp_write_queue_head to cached_skb
and then assigned to skb if packets_out was zero. Without this,
system is vulnerable to a carefully crafted ACKs which obviously
is remotely triggerable.

Besides, there's very little that needs to be done in sacktag
if there weren't any packets outstanding, just skipping the rest
doesn't hurt.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>

---
 net/ipv4/tcp_input.c |    5 +++++
 1 file changed, 5 insertions(+)

--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -1012,6 +1012,9 @@ tcp_sacktag_write_queue(struct sock *sk,
 	if (before(TCP_SKB_CB(ack_skb)->ack_seq, prior_snd_una - tp->max_window))
 		return 0;
 
+	if (!tp->packets_out)
+		goto out;
+
 	/* SACK fastpath:
 	 * if the only SACK change is the increase of the end_seq of
 	 * the first block then only apply that SACK block
@@ -1280,6 +1283,8 @@ tcp_sacktag_write_queue(struct sock *sk,
 	    (!tp->frto_highmark || after(tp->snd_una, tp->frto_highmark)))
 		tcp_update_reordering(sk, ((tp->fackets_out + 1) - reord), 0);
 
+out:
+
 #if FASTRETRANS_DEBUG > 0
 	BUG_TRAP((int)tp->sacked_out >= 0);
 	BUG_TRAP((int)tp->lost_out >= 0);


Patches currently in stable-queue which might be from ilpo.jarvinen@helsinki.fi are

queue-2.6.23/tcp-make-sure-write_queue_from-does-not-begin-with-null-ptr.patch
-
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